Spring-harrow



(No Model.)

L. A.. MANCHESTER.

SPRING EARROW.

No. 343,717. PatentedJune 15, 1886.

UNrrnD STATES Arnim trice.

SPRING-HARROW.

SPECIFICATION forming part of Letters Patent No. 343,717, dated June l 1886.

Application filed February 20, 1886. Serial No. 192,707. (No model.)

To @ZZ whom, it may concern.-

Be it known that I, LUMAN A. MANCHES- TER, of Merced, in the county of Merced and State of California, have invented an Improvement in Spring-Harrows; and Ihereby declare the following to be a full, clear, and exact description thereof.

My invention relates to the class of harrows; and it consists in the combination of the pe culiar curved spring-bars, the securing or unit-V ing bands, and the teeth acting as wedges and tightening all the parts together, all as I shall hereinafter describe.

The object of my invention is to provide a simple, strong, and effective harrow, the frame of which is of a springy character, the whole being secured together without bolts, screws,

' or rivets, and having no separate cross-bars.

Referring to the accompanying drawings, Figure 1 is a perspective view of my harrow fromA underneath. Fig. 2 is a view of one of the independent bars A. Fig. 3 is a view showing two bars connected. Fig. 4 is a view of the band B. Y

The frame consists'of the separate independent bars A. These are made of aspringy nature, preferably of steel. Each bar has a curved end, c, which is, however, not made on a true arc of a circle, so that when the bars are tted together the frame will have an oblique draft. Both ends of the bars are pro vided with small calks or hooks a'.

B are the sleeves or bands which unite the bars, which latter are so laid up as to lie parallel with each other in pairs traversing the length of the frame. The bands B are preferably of different sizes, which construction is necessary, as certain of said bands are designed to secure the ends of two, three, or more of the bars A, while the remaining bands may only embrace the side portions'of two of said bars. The hooked ends of the bars engage the edges of the end bands, whereby they are prevented from drawing out. The bars simply pass through intermediate bands. Through the bands vertically are made round holes b, through which the teeth C pass. These teeth are of the usual form, angular in crosssection, and they ca n thereforebe driven tightly into their round seats. The teeth pass between the barsA of each pair and wedgethem in the sides of the bauds, being thereby themselves wedged as well. This forms the'co1nplete harrow or any section of a complete harrow.

The bands, the bars, and the teeth are all wedged together tightly, and there is no need to use a single bolt, screw, orrivetin the whole frame; nor are there any cross -bars, the curved ends of the bars A acting as such.

When several sections are coupled together, I use rings instead of hinges.

The construction is simple, and the harrow can be made at small cost, and is durable and effective.

I am aware it is not broadly new to construct a harrow with spring or yielding frames and rigid teeth, nor is it new to embody in the construction of a harrow a spring or yielding frame and spring-teeth; therefore I do not broadly claim such construction as my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a harrow, the frame consisting of the bars A, having each a curved end by which they are united, substantially as described.

2. In a harrow, the frame consisting of the independent bars A, having aspringy nature, each bar havingacurved end, ce, bywhich they are united, substantially as described.

3. In a harrow, the independent bars A, having each a curved end, a, in combination with the bands B, by which said ends are conneeted, substantially as described.

4. In aharrow, theindependent bars A, having each a curved end, a, and a calli or hook, a', on each end, in combination with the bands B, with which the calks or hooks engage, and by which the bars are connected, substantially as described.

5. Ina harrow, the combination or" the independent bars A, having each a curved end, a, and arranged to form parallel pairs, the bands B, through which the bars pass, and the teeth C, passing through said bands and between the bars of each pair,whereby the whole is wedged together, substantially as described.

6. A harrow consisting of the independent bars A, having each a curved end, a, anda calk or hook, a', on both ends, said bars being arranged in parallel pairs, the bands B, through which the bars pass, and with the end ones of which the calks or hooks engage, andthe teeth C, passing through the bands and between the bars of each pair, whereby the wholeis wedged together, substantialtgT as described.

7. A harrow consisting` of the independent bars A, having each a curved end, a, and acalk or hook, ce', on both ends, said bars being of springy material, and so laid up as to form with their straight portions parallel pairs and with their curved portions the end connections thereof, the bands B, through which the bars pass, and with the end ones of which the ealks or hooks engage, and the teeth C, passing 15 through the bands and between the bars of each pair, whereby the whole is wedged together, substantially as described.

In witness whereof I have hereunto set my hand.

LUMAN A. MANCHESTER. `\Vitnesses:

A. C. SWMN, A. BADT. 

